Light-emitting element head, light-emitting element chip, image forming apparatus and signal supply method

a technology of light-emitting elements and image forming apparatus, which is applied in the direction of electrographic process, electrographic process apparatus, instruments, etc., can solve the problem of complicated signal bus line routing

Active Publication Date: 2012-06-05
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a light-emitting element head with multiple light-emitting element chips arranged in a line. The head includes a lighting signal supply unit that provides common lighting signals to the chips in a specific group, and a clock signal supply unit that provides different clock signals to the chips in the same group. These clock signals are used to activate the light-emitting elements in a sequential manner. The technical effect of this invention is to enable efficient and synchronized control of multiple light-emitting elements in a light-emitting element head.

Problems solved by technology

Accordingly, the number of signal bus lines for the light-emitting element heads increases with increase in the number of light-emitting element chips, and this complicates the routing of the signal bus lines.

Method used

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  • Light-emitting element head, light-emitting element chip, image forming apparatus and signal supply method
  • Light-emitting element head, light-emitting element chip, image forming apparatus and signal supply method
  • Light-emitting element head, light-emitting element chip, image forming apparatus and signal supply method

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Embodiment Construction

[0022]Hereinafter, a detail description will be given of exemplary embodiments of the present invention with reference to the attached drawings.

[0023]FIG. 1 shows an overall configuration of an image forming apparatus 1 to which the exemplary embodiment is to be applied.

[0024]The image forming apparatus 1 shown in FIG. 1 is generally called a tandem type image forming apparatus and the image forming apparatus 1 includes an image processing system 10, an image output controller 30 and an image processor 40. The image processing system 10 forms an image in accordance with different color tone datasets. The image output controller 30 controls the image processing system 10. The image processor 40, which is connected to devices such as a personal computer (PC) 2 and an image reading apparatus 3, performs predetermined image processing on image data received from the above devices.

[0025]The image processing system 10 includes image forming units 11. The image forming units 11 are formed ...

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Abstract

The light-emitting element head is provided with: plural light-emitting element chips in each of which light-emitting elements are arrayed in a line; a lighting signal supply unit supplying lighting signals for setting whether or not the light-emitting elements emit light, each of the lighting signals being provided in common to the light-emitting element chips that belong to one of N groups into which the plural light-emitting element chips are divided, where N is an integer of 2 or more; and a clock signal supply unit supplying a first clock signal as a transfer signal for causing the light-emitting elements to sequentially emit light, and second clock signals for setting the light-emitting elements ready to emit light, the second clock signals being different from one another, being supplied to the respective light-emitting element chips belonging to the one of the N groups, and being supplied in common across the N groups.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is based on and claims priority under 35 USC §119 from Japanese Patent Application No. 2008-287649 filed Nov. 10, 2008.BACKGROUND[0002]1. Technical Field[0003]The present invention relates to a light-emitting element head, a light-emitting element chip, an image forming apparatus and a signal supply method.[0004]2. Related Art[0005]In an electrophotographic image forming apparatus such as a printer, a copy machine or a facsimile machine, an image is formed on a recording paper sheet as follows. Firstly, an electrostatic latent image is formed on a charged photoconductor by causing an optical recording unit to emit light on the basis of image information. Then, the electrostatic latent image is made visible by being developed with toner. Lastly, the toner image is transferred on and fixed to the recording paper sheet. As such an optical recording unit, in addition to an optical-scanning recording unit that performs exposur...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): B41J2/45B41J2/44B41J2/455H01L33/00H01L33/08
CPCG03G15/326G03G15/04045G03G2215/0409
InventorOHNO, SEIJI
OwnerFUJIFILM BUSINESS INNOVATION CORP